Nail-treatment device



FIG. 1 is a perspective view of an embodiment of a nail treatment device showing my new design;

FIG. 2 is a rear view thereof, the front view being a mirror image of the rear view; and,

FIG. 3 is a top view thereof, the bottom view thereof being a mirror image of the rear view.

The broken line portions shown in FIGS. 1 to 3 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a nail-treatment device, as shown and described. 